The 6.6-lb SATA II Seagate BlackArmor 220 NAS with two drive bays has 2, 4 and 6 TB storage capacities. It is compatible with Microsoft RALLY, Apple Bonjour, NFS, HTTP/S, FTP, and CIFS network protocols. Supports RAID 0, 1, and JBOD. Receive extra protection with its government-grade hardware encryption. Actual dimensions are 7.79 x 4.09 x 7.4 inches.